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Thread: GPS System - Dashmount 7" touchscreen

  1. 3rd February 2007, 10:29 PM #11
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    Quote Originally Posted by p38arover View Post
    Hmm, very nice!

    It's giving me ideas. I've an old 233MHz Pentium laptop that doesn't have a working screen (OK on external monitor).

    How expensive are the 7" VGA touch screens?

    Ron
    Check out ebay for touch screens there are loads of them.

    I'm seriously looking into building one of these things from scratch, PC as well.
    I have the basics, donor PC, 12DC power supply, I'm planning to make a custom, (readDIY) case I just need to get my ???? into gear.
    Once I have the basic PC running I'll get the GPS reciever & screen.
    I want to try and get a mobo with an intergrated video card, it would make the PC case much smaller/flatter; "but beggars can't choosers" so I might just end up with a bit of a 'bump' in the top of the case.
    Last edited by HangOver; 4th February 2007 at 12:27 AM.
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  2. 4th February 2007, 05:56 AM #12
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    Quote Originally Posted by p38arover View Post
    Hmm, very nice!

    It's giving me ideas. I've an old 233MHz Pentium laptop that doesn't have a working screen (OK on external monitor).

    How expensive are the 7" VGA touch screens?

    Ron
    Hope you are sitting down. At the time they were around $700 for this model. They had cheaper ones without the composite video inputs or touch panel. I decided to purchase from an Australian distributor. Probably could have got it imported for less. Most likely cheaper now.

    My research showed there were a number around at the time but the Xenarc/(rebadged Xenarc) may have had a little better reliability. While I'm sure there are many happy campers with other screens, there were also more people with problems. Have a read through the mp3car.com forums.
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  3. 4th February 2007, 02:28 PM #13
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    I have heard that stuffed cd stacker cases work well for a car pc and they have a sort of suspension built in.
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  4. 4th February 2007, 03:01 PM #14
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    The 8" touch screens have come down a fair bit in price. A good one can be bought here in Australia for $450-500 or do as I did and get exactly the same unity form Hong Kong for about $200 including freight. Has all the plugs etc usb, vga, rca etc. I think I need a bigger inverter to run the lap top 150w does not seem to be enough.
    Whats a better option inverter or a regulator??
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  5. 4th February 2007, 09:50 PM #15
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    top job
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  6. 4th February 2007, 09:59 PM #16
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    Quote Originally Posted by CraigE View Post
    The 8" touch screens have come down a fair bit in price. A good one can be bought here in Australia for $450-500 or do as I did and get exactly the same unity form Hong Kong for about $200 including freight. Has all the plugs etc usb, vga, rca etc. I think I need a bigger inverter to run the lap top 150w does not seem to be enough.
    Whats a better option inverter or a regulator??
    My laptop uses a 12v supply (normally from a 240v power pack) so I just run it off the vehicle's 12v.
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  7. 4th February 2007, 10:36 PM #17
    tombraider Guest
    Quote Originally Posted by CraigE View Post
    The 8" touch screens have come down a fair bit in price. A good one can be bought here in Australia for $450-500 or do as I did and get exactly the same unity form Hong Kong for about $200 including freight. Has all the plugs etc usb, vga, rca etc. I think I need a bigger inverter to run the lap top 150w does not seem to be enough.
    Whats a better option inverter or a regulator??
    Regulator...

    Avoid 240v systems in vehicle wherever possible.

    (Pop!!! There goes the can of worms)
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  8. 4th February 2007, 10:42 PM #18
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    Quote Originally Posted by tombraider View Post
    Regulator...

    Avoid 240v systems in vehicle wherever possible.

    (Pop!!! There goes the can of worms)
    Totally agree


    - you should easily be able to convert any computer to operate on 12v

    The internals run on 12v and 5v anyway, there is nothing in a pc/laptop than needs 240v

    There are quite a few ciggy adaptors available to run laptops - and the more expensive seem to have the bits in to remove spikes and troughs
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  9. 5th February 2007, 03:55 PM #19
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    Hi, nice setup.

    I have something similar with a Liliput sceen (7" in the Disco and 8" in the Rangie) which plug into the laptop which is powered by a DC-DC converter. The main problem is that it is not a good enviroment for the laptop.

    How much was the computer you use?
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  10. 5th February 2007, 05:01 PM #20
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    Quote Originally Posted by Graeme View Post
    My laptop uses a 12v supply (normally from a 240v power pack) so I just run it off the vehicle's 12v.
    I'm not keen on running straight from the vehicle's 12V. It's not very stable for electronic devices.

    First off it may drop a fair bit when cranking over the engine. Some systems will drop out due to low voltage. Maybe it will just freeze up every now and again. Then again you might not notice anything but be stressing internal componants which may fail down the track (no pun intended).

    Once the engine's running you are going to be feeding in about 14V. Your equipment may cope but then again it may stress the innards and cause problems later.

    You'll find many people coming up with solutions to the problem of "surviving the crank". Personally I solved all my problems with the DC-DC regulator. It also handles startup/shutdown and abnormal power conditions for me.
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